<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.mydiv{
border:1px solid red;
boder-radius:50%;
background-color:rgb(23,56,76);
margin-top:1px;
float: left;
}
            </style>
</head>
<body>
                <?php
                    foreach ($_GET as $k=>$v){
          echo "<br/>".$k."--->".$v;
                    }
    echo "<hr/>";
    $count=isset($_GET["c"])?$_GET["c"]:20;
    $start_height=isset($_GET["h"])?$_GET["h"]:20;
    $index=1;
    while($index<$count){
        $mydivheight=$start_height+$index*0.1;
        $mydivwidth=$start_height+$index*0.1;
        $color1=123+$index*7;
        $color2=213+$index*6;
        $color3=5+$index*5;
        $color1=$color1%255;
        $color2=$color2%255;
        $color3=$color3%255;
        echo "<div class=\"mydiv\" style=\"" 
        ."height:${mydivheight}px;"
        . "width:${mydivwidth}px;"
        . "\">";
        echo "</div>";
            $index++;
        }
    
                ?>
</body>
</html>